ammeter's Usage Examples:

The ammeter to be calibrated is placed in series with a suitable low resistance which may be �i ohm, �oi ohm, �ooi ohm or more as the case may be.

There is therefore a certain ratio in which any current passing through the ammeter is divided between the shunt and the working wire.

Such an instrument is called a shunted movable coil ammeter, and is represented by a type of instrument shown in fig.

In its simplest form an electromagnetic ammeter consists of a circular coil of wire in which is pivoted eccentrically an index needle carrying at its lower end a small mass of iron.

A steady continuous current is then passed through the ammeter and low resistance, placed in series with one another and adjusted so as to give any required scale reading on the ammeter.

A much better form of electromagnetic ammeter can be constructed on a principle now extensively employed, which consists in pivoting in the strong field of a permanent magnet a small coil through which a part of the current to be measured is sent.

The capacity of the condenser is then altered until the maximum current, as indicated by a hot wire ammeter, is produced in the circuit.

AMPEREMETER, or Ammeter, an instrument for the measurement of electric currents in terms of the unit called the ampere.

Another form of hot-wire ammeter is a modification of the electric thermometer originally invented by Sir W.

- Shunted Movable Coil Ammeter, Isenthal ' Co.

Synonyms:

meter, milliammeter,